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Proceedings Paper

Outdoor laser-tracking system
Author(s): Katuo Seta; Ichiro Fujima; Iwao Ishikawa
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Paper Abstract

A laser tracking system has been developed to trace a moving target for outdoor measurements of 3D position. Beam direction of a 670 nm laser diode is controlled with two mirrors mounted on Galvano scanners, for horizontal ((phi) ) and vertical ((theta) ) directions, respectively, in order to trace a target made of reflection sheet. The beam reflected by a the target is detected at a quadrant photodiode to estimate the position of the target. The distance D between the apparatus and the target was measured with a range finder of 830 nm LED, the light beam from which is superposed on the beam for tracking by a beam combiner. Finally 3D position of the target is estimated from two azimuth angles of the 2 scanners and the measured distance. The whole system was set on a crane to measure the position of a weight suspended by the crane's arm. Up to about 100 m, this system traced the target and detected the distance. The 3D position of the target is measured with a resolution of 10 mm.

Paper Details

Date Published: 8 April 1996
PDF: 7 pages
Proc. SPIE 2703, Lasers as Tools for Manufacturing of Durable Goods and Microelectronics, (8 April 1996); doi: 10.1117/12.237749
Show Author Affiliations
Katuo Seta, National Research Lab. of Metrology (Japan)
Ichiro Fujima, National Research Lab. of Metrology (Japan)
Iwao Ishikawa, National Research Lab. of Metrology (Japan)

Published in SPIE Proceedings Vol. 2703:
Lasers as Tools for Manufacturing of Durable Goods and Microelectronics
Jan J. Dubowski; Jyotirmoy Mazumder; Leonard R. Migliore; Chandrasekhar Roychoudhuri; Ronald D. Schaeffer, Editor(s)

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